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[mirror_ubuntu-zesty-kernel.git] / drivers / net / wireless / intel / iwlwifi / mvm / scan.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <linuxwifi@intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "fw-api-scan.h"
71
72 #define IWL_DENSE_EBS_SCAN_RATIO 5
73 #define IWL_SPARSE_EBS_SCAN_RATIO 1
74
75 enum iwl_mvm_traffic_load {
76 IWL_MVM_TRAFFIC_LOW,
77 IWL_MVM_TRAFFIC_MEDIUM,
78 IWL_MVM_TRAFFIC_HIGH,
79 };
80
81 struct iwl_mvm_scan_timing_params {
82 u32 dwell_active;
83 u32 dwell_passive;
84 u32 dwell_fragmented;
85 u32 dwell_extended;
86 u32 suspend_time;
87 u32 max_out_time;
88 };
89
90 static struct iwl_mvm_scan_timing_params scan_timing[] = {
91 [IWL_SCAN_TYPE_UNASSOC] = {
92 .dwell_active = 10,
93 .dwell_passive = 110,
94 .dwell_fragmented = 44,
95 .dwell_extended = 90,
96 .suspend_time = 0,
97 .max_out_time = 0,
98 },
99 [IWL_SCAN_TYPE_WILD] = {
100 .dwell_active = 10,
101 .dwell_passive = 110,
102 .dwell_fragmented = 44,
103 .dwell_extended = 90,
104 .suspend_time = 30,
105 .max_out_time = 120,
106 },
107 [IWL_SCAN_TYPE_MILD] = {
108 .dwell_active = 10,
109 .dwell_passive = 110,
110 .dwell_fragmented = 44,
111 .dwell_extended = 90,
112 .suspend_time = 120,
113 .max_out_time = 120,
114 },
115 [IWL_SCAN_TYPE_FRAGMENTED] = {
116 .dwell_active = 10,
117 .dwell_passive = 110,
118 .dwell_fragmented = 44,
119 .suspend_time = 95,
120 .max_out_time = 44,
121 },
122 };
123
124 struct iwl_mvm_scan_params {
125 enum iwl_mvm_scan_type type;
126 u32 n_channels;
127 u16 delay;
128 int n_ssids;
129 struct cfg80211_ssid *ssids;
130 struct ieee80211_channel **channels;
131 u32 flags;
132 u8 *mac_addr;
133 u8 *mac_addr_mask;
134 bool no_cck;
135 bool pass_all;
136 int n_match_sets;
137 struct iwl_scan_probe_req preq;
138 struct cfg80211_match_set *match_sets;
139 int n_scan_plans;
140 struct cfg80211_sched_scan_plan *scan_plans;
141 };
142
143 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
144 {
145 if (mvm->scan_rx_ant != ANT_NONE)
146 return mvm->scan_rx_ant;
147 return iwl_mvm_get_valid_rx_ant(mvm);
148 }
149
150 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
151 {
152 u16 rx_chain;
153 u8 rx_ant;
154
155 rx_ant = iwl_mvm_scan_rx_ant(mvm);
156 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
157 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
158 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
159 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
160 return cpu_to_le16(rx_chain);
161 }
162
163 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
164 {
165 if (band == IEEE80211_BAND_2GHZ)
166 return cpu_to_le32(PHY_BAND_24);
167 else
168 return cpu_to_le32(PHY_BAND_5);
169 }
170
171 static inline __le32
172 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
173 bool no_cck)
174 {
175 u32 tx_ant;
176
177 mvm->scan_last_antenna_idx =
178 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
179 mvm->scan_last_antenna_idx);
180 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
181
182 if (band == IEEE80211_BAND_2GHZ && !no_cck)
183 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
184 tx_ant);
185 else
186 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
187 }
188
189 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
190 struct ieee80211_vif *vif)
191 {
192 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
193 int *global_cnt = data;
194
195 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
196 mvmvif->phy_ctxt->id < MAX_PHYS)
197 *global_cnt += 1;
198 }
199
200 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
201 {
202 return IWL_MVM_TRAFFIC_LOW;
203 }
204
205 static enum
206 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
207 {
208 int global_cnt = 0;
209 enum iwl_mvm_traffic_load load;
210 bool low_latency;
211
212 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
213 IEEE80211_IFACE_ITER_NORMAL,
214 iwl_mvm_scan_condition_iterator,
215 &global_cnt);
216 if (!global_cnt)
217 return IWL_SCAN_TYPE_UNASSOC;
218
219 load = iwl_mvm_get_traffic_load(mvm);
220 low_latency = iwl_mvm_low_latency(mvm);
221
222 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
223 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
224 return IWL_SCAN_TYPE_FRAGMENTED;
225
226 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
227 return IWL_SCAN_TYPE_MILD;
228
229 return IWL_SCAN_TYPE_WILD;
230 }
231
232 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
233 {
234 /* require rrm scan whenever the fw supports it */
235 return fw_has_capa(&mvm->fw->ucode_capa,
236 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
237 }
238
239 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
240 {
241 int max_probe_len;
242
243 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
244
245 /* we create the 802.11 header and SSID element */
246 max_probe_len -= 24 + 2;
247
248 /* DS parameter set element is added on 2.4GHZ band if required */
249 if (iwl_mvm_rrm_scan_needed(mvm))
250 max_probe_len -= 3;
251
252 return max_probe_len;
253 }
254
255 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
256 {
257 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
258
259 /* TODO: [BUG] This function should return the maximum allowed size of
260 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
261 * in the same command. So the correct implementation of this function
262 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
263 * command has only 512 bytes and it would leave us with about 240
264 * bytes for scan IEs, which is clearly not enough. So meanwhile
265 * we will report an incorrect value. This may result in a failure to
266 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
267 * functions with -ENOBUFS, if a large enough probe will be provided.
268 */
269 return max_ie_len;
270 }
271
272 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
273 int num_res, u8 *buf, size_t buf_size)
274 {
275 int i;
276 u8 *pos = buf, *end = buf + buf_size;
277
278 for (i = 0; pos < end && i < num_res; i++)
279 pos += snprintf(pos, end - pos, " %u", res[i].channel);
280
281 /* terminate the string in case the buffer was too short */
282 *(buf + buf_size - 1) = '\0';
283
284 return buf;
285 }
286
287 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
288 struct iwl_rx_cmd_buffer *rxb)
289 {
290 struct iwl_rx_packet *pkt = rxb_addr(rxb);
291 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
292 u8 buf[256];
293
294 IWL_DEBUG_SCAN(mvm,
295 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
296 notif->status, notif->scanned_channels,
297 iwl_mvm_dump_channel_list(notif->results,
298 notif->scanned_channels, buf,
299 sizeof(buf)));
300 }
301
302 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
303 struct iwl_rx_cmd_buffer *rxb)
304 {
305 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
306 ieee80211_sched_scan_results(mvm->hw);
307 }
308
309 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
310 {
311 switch (status) {
312 case IWL_SCAN_EBS_SUCCESS:
313 return "successful";
314 case IWL_SCAN_EBS_INACTIVE:
315 return "inactive";
316 case IWL_SCAN_EBS_FAILED:
317 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
318 default:
319 return "failed";
320 }
321 }
322
323 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
324 struct iwl_rx_cmd_buffer *rxb)
325 {
326 struct iwl_rx_packet *pkt = rxb_addr(rxb);
327 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
328 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
329
330 /* If this happens, the firmware has mistakenly sent an LMAC
331 * notification during UMAC scans -- warn and ignore it.
332 */
333 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
334 IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
335 return;
336
337 /* scan status must be locked for proper checking */
338 lockdep_assert_held(&mvm->mutex);
339
340 /* We first check if we were stopping a scan, in which case we
341 * just clear the stopping flag. Then we check if it was a
342 * firmware initiated stop, in which case we need to inform
343 * mac80211.
344 * Note that we can have a stopping and a running scan
345 * simultaneously, but we can't have two different types of
346 * scans stopping or running at the same time (since LMAC
347 * doesn't support it).
348 */
349
350 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
351 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
352
353 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
354 aborted ? "aborted" : "completed",
355 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
356 IWL_DEBUG_SCAN(mvm,
357 "Last line %d, Last iteration %d, Time after last iteration %d\n",
358 scan_notif->last_schedule_line,
359 scan_notif->last_schedule_iteration,
360 __le32_to_cpu(scan_notif->time_after_last_iter));
361
362 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
363 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
364 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
365 aborted ? "aborted" : "completed",
366 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
367
368 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
369 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
370 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
371
372 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
373 aborted ? "aborted" : "completed",
374 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
375 IWL_DEBUG_SCAN(mvm,
376 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
377 scan_notif->last_schedule_line,
378 scan_notif->last_schedule_iteration,
379 __le32_to_cpu(scan_notif->time_after_last_iter));
380
381 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
382 ieee80211_sched_scan_stopped(mvm->hw);
383 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
384 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
385 aborted ? "aborted" : "completed",
386 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
387
388 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
389 ieee80211_scan_completed(mvm->hw,
390 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
391 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
392 }
393
394 mvm->last_ebs_successful =
395 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
396 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
397 }
398
399 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
400 {
401 int i;
402
403 for (i = 0; i < PROBE_OPTION_MAX; i++) {
404 if (!ssid_list[i].len)
405 break;
406 if (ssid_list[i].len == ssid_len &&
407 !memcmp(ssid_list->ssid, ssid, ssid_len))
408 return i;
409 }
410 return -1;
411 }
412
413 /* We insert the SSIDs in an inverted order, because the FW will
414 * invert it back.
415 */
416 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
417 struct iwl_ssid_ie *ssids,
418 u32 *ssid_bitmap)
419 {
420 int i, j;
421 int index;
422
423 /*
424 * copy SSIDs from match list.
425 * iwl_config_sched_scan_profiles() uses the order of these ssids to
426 * config match list.
427 */
428 for (i = 0, j = params->n_match_sets - 1;
429 j >= 0 && i < PROBE_OPTION_MAX;
430 i++, j--) {
431 /* skip empty SSID matchsets */
432 if (!params->match_sets[j].ssid.ssid_len)
433 continue;
434 ssids[i].id = WLAN_EID_SSID;
435 ssids[i].len = params->match_sets[j].ssid.ssid_len;
436 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
437 ssids[i].len);
438 }
439
440 /* add SSIDs from scan SSID list */
441 *ssid_bitmap = 0;
442 for (j = params->n_ssids - 1;
443 j >= 0 && i < PROBE_OPTION_MAX;
444 i++, j--) {
445 index = iwl_ssid_exist(params->ssids[j].ssid,
446 params->ssids[j].ssid_len,
447 ssids);
448 if (index < 0) {
449 ssids[i].id = WLAN_EID_SSID;
450 ssids[i].len = params->ssids[j].ssid_len;
451 memcpy(ssids[i].ssid, params->ssids[j].ssid,
452 ssids[i].len);
453 *ssid_bitmap |= BIT(i);
454 } else {
455 *ssid_bitmap |= BIT(index);
456 }
457 }
458 }
459
460 static int
461 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
462 struct cfg80211_sched_scan_request *req)
463 {
464 struct iwl_scan_offload_profile *profile;
465 struct iwl_scan_offload_profile_cfg *profile_cfg;
466 struct iwl_scan_offload_blacklist *blacklist;
467 struct iwl_host_cmd cmd = {
468 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
469 .len[1] = sizeof(*profile_cfg),
470 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
471 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
472 };
473 int blacklist_len;
474 int i;
475 int ret;
476
477 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
478 return -EIO;
479
480 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
481 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
482 else
483 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
484
485 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
486 if (!blacklist)
487 return -ENOMEM;
488
489 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
490 if (!profile_cfg) {
491 ret = -ENOMEM;
492 goto free_blacklist;
493 }
494
495 cmd.data[0] = blacklist;
496 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
497 cmd.data[1] = profile_cfg;
498
499 /* No blacklist configuration */
500
501 profile_cfg->num_profiles = req->n_match_sets;
502 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
503 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
504 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
505 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
506 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
507
508 for (i = 0; i < req->n_match_sets; i++) {
509 profile = &profile_cfg->profiles[i];
510 profile->ssid_index = i;
511 /* Support any cipher and auth algorithm */
512 profile->unicast_cipher = 0xff;
513 profile->auth_alg = 0xff;
514 profile->network_type = IWL_NETWORK_TYPE_ANY;
515 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
516 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
517 }
518
519 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
520
521 ret = iwl_mvm_send_cmd(mvm, &cmd);
522 kfree(profile_cfg);
523 free_blacklist:
524 kfree(blacklist);
525
526 return ret;
527 }
528
529 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
530 struct cfg80211_sched_scan_request *req)
531 {
532 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
533 IWL_DEBUG_SCAN(mvm,
534 "Sending scheduled scan with filtering, n_match_sets %d\n",
535 req->n_match_sets);
536 return false;
537 }
538
539 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
540 return true;
541 }
542
543 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
544 {
545 int ret;
546 struct iwl_host_cmd cmd = {
547 .id = SCAN_OFFLOAD_ABORT_CMD,
548 };
549 u32 status;
550
551 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
552 if (ret)
553 return ret;
554
555 if (status != CAN_ABORT_STATUS) {
556 /*
557 * The scan abort will return 1 for success or
558 * 2 for "failure". A failure condition can be
559 * due to simply not being in an active scan which
560 * can occur if we send the scan abort before the
561 * microcode has notified us that a scan is completed.
562 */
563 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
564 ret = -ENOENT;
565 }
566
567 return ret;
568 }
569
570 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
571 struct iwl_scan_req_tx_cmd *tx_cmd,
572 bool no_cck)
573 {
574 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
575 TX_CMD_FLG_BT_DIS);
576 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
577 IEEE80211_BAND_2GHZ,
578 no_cck);
579 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
580
581 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
582 TX_CMD_FLG_BT_DIS);
583 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
584 IEEE80211_BAND_5GHZ,
585 no_cck);
586 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
587 }
588
589 static void
590 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
591 struct ieee80211_channel **channels,
592 int n_channels, u32 ssid_bitmap,
593 struct iwl_scan_req_lmac *cmd)
594 {
595 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
596 int i;
597
598 for (i = 0; i < n_channels; i++) {
599 channel_cfg[i].channel_num =
600 cpu_to_le16(channels[i]->hw_value);
601 channel_cfg[i].iter_count = cpu_to_le16(1);
602 channel_cfg[i].iter_interval = 0;
603 channel_cfg[i].flags =
604 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
605 ssid_bitmap);
606 }
607 }
608
609 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
610 size_t len, u8 *const pos)
611 {
612 static const u8 before_ds_params[] = {
613 WLAN_EID_SSID,
614 WLAN_EID_SUPP_RATES,
615 WLAN_EID_REQUEST,
616 WLAN_EID_EXT_SUPP_RATES,
617 };
618 size_t offs;
619 u8 *newpos = pos;
620
621 if (!iwl_mvm_rrm_scan_needed(mvm)) {
622 memcpy(newpos, ies, len);
623 return newpos + len;
624 }
625
626 offs = ieee80211_ie_split(ies, len,
627 before_ds_params,
628 ARRAY_SIZE(before_ds_params),
629 0);
630
631 memcpy(newpos, ies, offs);
632 newpos += offs;
633
634 /* Add a placeholder for DS Parameter Set element */
635 *newpos++ = WLAN_EID_DS_PARAMS;
636 *newpos++ = 1;
637 *newpos++ = 0;
638
639 memcpy(newpos, ies + offs, len - offs);
640 newpos += len - offs;
641
642 return newpos;
643 }
644
645 static void
646 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
647 struct ieee80211_scan_ies *ies,
648 struct iwl_mvm_scan_params *params)
649 {
650 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
651 u8 *pos, *newpos;
652 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
653 params->mac_addr : NULL;
654
655 /*
656 * Unfortunately, right now the offload scan doesn't support randomising
657 * within the firmware, so until the firmware API is ready we implement
658 * it in the driver. This means that the scan iterations won't really be
659 * random, only when it's restarted, but at least that helps a bit.
660 */
661 if (mac_addr)
662 get_random_mask_addr(frame->sa, mac_addr,
663 params->mac_addr_mask);
664 else
665 memcpy(frame->sa, vif->addr, ETH_ALEN);
666
667 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
668 eth_broadcast_addr(frame->da);
669 eth_broadcast_addr(frame->bssid);
670 frame->seq_ctrl = 0;
671
672 pos = frame->u.probe_req.variable;
673 *pos++ = WLAN_EID_SSID;
674 *pos++ = 0;
675
676 params->preq.mac_header.offset = 0;
677 params->preq.mac_header.len = cpu_to_le16(24 + 2);
678
679 /* Insert ds parameter set element on 2.4 GHz band */
680 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
681 ies->ies[IEEE80211_BAND_2GHZ],
682 ies->len[IEEE80211_BAND_2GHZ],
683 pos);
684 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
685 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
686 pos = newpos;
687
688 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
689 ies->len[IEEE80211_BAND_5GHZ]);
690 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
691 params->preq.band_data[1].len =
692 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
693 pos += ies->len[IEEE80211_BAND_5GHZ];
694
695 memcpy(pos, ies->common_ies, ies->common_ie_len);
696 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
697 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
698 }
699
700 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
701 enum iwl_scan_priority_ext prio)
702 {
703 if (fw_has_api(&mvm->fw->ucode_capa,
704 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
705 return cpu_to_le32(prio);
706
707 if (prio <= IWL_SCAN_PRIORITY_EXT_2)
708 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
709
710 if (prio <= IWL_SCAN_PRIORITY_EXT_4)
711 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
712
713 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
714 }
715
716 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
717 struct iwl_scan_req_lmac *cmd,
718 struct iwl_mvm_scan_params *params)
719 {
720 cmd->active_dwell = scan_timing[params->type].dwell_active;
721 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
722 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
723 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
724 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
725 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
726 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
727 }
728
729 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
730 struct ieee80211_scan_ies *ies,
731 int n_channels)
732 {
733 return ((n_ssids <= PROBE_OPTION_MAX) &&
734 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
735 (ies->common_ie_len +
736 ies->len[NL80211_BAND_2GHZ] +
737 ies->len[NL80211_BAND_5GHZ] <=
738 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
739 }
740
741 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
742 struct ieee80211_vif *vif)
743 {
744 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
745
746 /* We can only use EBS if:
747 * 1. the feature is supported;
748 * 2. the last EBS was successful;
749 * 3. if only single scan, the single scan EBS API is supported;
750 * 4. it's not a p2p find operation.
751 */
752 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
753 mvm->last_ebs_successful &&
754 vif->type != NL80211_IFTYPE_P2P_DEVICE);
755 }
756
757 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
758 {
759 return params->n_scan_plans == 1 &&
760 params->scan_plans[0].iterations == 1;
761 }
762
763 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
764 struct iwl_mvm_scan_params *params,
765 struct ieee80211_vif *vif)
766 {
767 int flags = 0;
768
769 if (params->n_ssids == 0)
770 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
771
772 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
773 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
774
775 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
776 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
777
778 if (iwl_mvm_rrm_scan_needed(mvm))
779 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
780
781 if (params->pass_all)
782 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
783 else
784 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
785
786 #ifdef CONFIG_IWLWIFI_DEBUGFS
787 if (mvm->scan_iter_notif_enabled)
788 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
789 #endif
790
791 if (iwl_mvm_is_regular_scan(params) &&
792 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
793 params->type != IWL_SCAN_TYPE_FRAGMENTED)
794 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
795
796 return flags;
797 }
798
799 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
800 struct iwl_mvm_scan_params *params)
801 {
802 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
803 struct iwl_scan_probe_req *preq =
804 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
805 mvm->fw->ucode_capa.n_scan_channels);
806 u32 ssid_bitmap = 0;
807 int i;
808
809 lockdep_assert_held(&mvm->mutex);
810
811 memset(cmd, 0, ksize(cmd));
812
813 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
814 return -EINVAL;
815
816 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
817
818 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
819 cmd->iter_num = cpu_to_le32(1);
820 cmd->n_channels = (u8)params->n_channels;
821
822 cmd->delay = cpu_to_le32(params->delay);
823
824 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
825 vif));
826
827 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
828 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
829 MAC_FILTER_IN_BEACON);
830 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
831 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
832
833 /* this API uses bits 1-20 instead of 0-19 */
834 ssid_bitmap <<= 1;
835
836 for (i = 0; i < params->n_scan_plans; i++) {
837 struct cfg80211_sched_scan_plan *scan_plan =
838 &params->scan_plans[i];
839
840 cmd->schedule[i].delay =
841 cpu_to_le16(scan_plan->interval);
842 cmd->schedule[i].iterations = scan_plan->iterations;
843 cmd->schedule[i].full_scan_mul = 1;
844 }
845
846 /*
847 * If the number of iterations of the last scan plan is set to
848 * zero, it should run infinitely. However, this is not always the case.
849 * For example, when regular scan is requested the driver sets one scan
850 * plan with one iteration.
851 */
852 if (!cmd->schedule[i - 1].iterations)
853 cmd->schedule[i - 1].iterations = 0xff;
854
855 if (iwl_mvm_scan_use_ebs(mvm, vif)) {
856 cmd->channel_opt[0].flags =
857 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
858 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
859 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
860 cmd->channel_opt[0].non_ebs_ratio =
861 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
862 cmd->channel_opt[1].flags =
863 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
864 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
865 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
866 cmd->channel_opt[1].non_ebs_ratio =
867 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
868 }
869
870 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
871 params->n_channels, ssid_bitmap, cmd);
872
873 *preq = params->preq;
874
875 return 0;
876 }
877
878 static int rate_to_scan_rate_flag(unsigned int rate)
879 {
880 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
881 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
882 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
883 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
884 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
885 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
886 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
887 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
888 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
889 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
890 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
891 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
892 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
893 };
894
895 return rate_to_scan_rate[rate];
896 }
897
898 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
899 {
900 struct ieee80211_supported_band *band;
901 unsigned int rates = 0;
902 int i;
903
904 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
905 for (i = 0; i < band->n_bitrates; i++)
906 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
907 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
908 for (i = 0; i < band->n_bitrates; i++)
909 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
910
911 /* Set both basic rates and supported rates */
912 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
913
914 return cpu_to_le32(rates);
915 }
916
917 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
918 {
919 struct iwl_scan_config *scan_config;
920 struct ieee80211_supported_band *band;
921 int num_channels =
922 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
923 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
924 int ret, i, j = 0, cmd_size;
925 struct iwl_host_cmd cmd = {
926 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
927 };
928 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
929
930 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
931 return -ENOBUFS;
932
933 if (type == mvm->scan_type)
934 return 0;
935
936 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
937
938 scan_config = kzalloc(cmd_size, GFP_KERNEL);
939 if (!scan_config)
940 return -ENOMEM;
941
942 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
943 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
944 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
945 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
946 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
947 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
948 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
949 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
950 SCAN_CONFIG_N_CHANNELS(num_channels) |
951 (type == IWL_SCAN_TYPE_FRAGMENTED ?
952 SCAN_CONFIG_FLAG_SET_FRAGMENTED :
953 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
954 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
955 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
956 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
957 scan_config->out_of_channel_time =
958 cpu_to_le32(scan_timing[type].max_out_time);
959 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
960 scan_config->dwell_active = scan_timing[type].dwell_active;
961 scan_config->dwell_passive = scan_timing[type].dwell_passive;
962 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
963 scan_config->dwell_extended = scan_timing[type].dwell_extended;
964
965 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
966
967 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
968 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
969 IWL_CHANNEL_FLAG_ACCURATE_EBS |
970 IWL_CHANNEL_FLAG_EBS_ADD |
971 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
972
973 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
974 for (i = 0; i < band->n_channels; i++, j++)
975 scan_config->channel_array[j] = band->channels[i].hw_value;
976 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
977 for (i = 0; i < band->n_channels; i++, j++)
978 scan_config->channel_array[j] = band->channels[i].hw_value;
979
980 cmd.data[0] = scan_config;
981 cmd.len[0] = cmd_size;
982 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
983
984 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
985
986 ret = iwl_mvm_send_cmd(mvm, &cmd);
987 if (!ret)
988 mvm->scan_type = type;
989
990 kfree(scan_config);
991 return ret;
992 }
993
994 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
995 {
996 int i;
997
998 for (i = 0; i < mvm->max_scans; i++)
999 if (mvm->scan_uid_status[i] == status)
1000 return i;
1001
1002 return -ENOENT;
1003 }
1004
1005 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1006 struct iwl_scan_req_umac *cmd,
1007 struct iwl_mvm_scan_params *params)
1008 {
1009 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
1010 cmd->active_dwell = scan_timing[params->type].dwell_active;
1011 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
1012 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
1013 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
1014 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
1015 cmd->scan_priority =
1016 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1017
1018 if (iwl_mvm_is_regular_scan(params))
1019 cmd->ooc_priority =
1020 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1021 else
1022 cmd->ooc_priority =
1023 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1024 }
1025
1026 static void
1027 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1028 struct ieee80211_channel **channels,
1029 int n_channels, u32 ssid_bitmap,
1030 struct iwl_scan_req_umac *cmd)
1031 {
1032 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1033 int i;
1034
1035 for (i = 0; i < n_channels; i++) {
1036 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1037 channel_cfg[i].channel_num = channels[i]->hw_value;
1038 channel_cfg[i].iter_count = 1;
1039 channel_cfg[i].iter_interval = 0;
1040 }
1041 }
1042
1043 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1044 struct iwl_mvm_scan_params *params,
1045 struct ieee80211_vif *vif)
1046 {
1047 int flags = 0;
1048
1049 if (params->n_ssids == 0)
1050 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1051
1052 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1053 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1054
1055 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1056 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1057
1058 if (iwl_mvm_rrm_scan_needed(mvm))
1059 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1060
1061 if (params->pass_all)
1062 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1063 else
1064 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1065
1066 if (!iwl_mvm_is_regular_scan(params))
1067 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1068
1069 #ifdef CONFIG_IWLWIFI_DEBUGFS
1070 if (mvm->scan_iter_notif_enabled)
1071 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1072 #endif
1073
1074 if (iwl_mvm_is_regular_scan(params) &&
1075 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1076 params->type != IWL_SCAN_TYPE_FRAGMENTED)
1077 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1078
1079 return flags;
1080 }
1081
1082 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1083 struct iwl_mvm_scan_params *params,
1084 int type)
1085 {
1086 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1087 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1088 sizeof(struct iwl_scan_channel_cfg_umac) *
1089 mvm->fw->ucode_capa.n_scan_channels;
1090 int uid, i;
1091 u32 ssid_bitmap = 0;
1092
1093 lockdep_assert_held(&mvm->mutex);
1094
1095 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1096 return -EINVAL;
1097
1098 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1099 if (uid < 0)
1100 return uid;
1101
1102 memset(cmd, 0, ksize(cmd));
1103
1104 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1105
1106 mvm->scan_uid_status[uid] = type;
1107
1108 cmd->uid = cpu_to_le32(uid);
1109 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params,
1110 vif));
1111
1112 if (type == IWL_MVM_SCAN_SCHED)
1113 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1114
1115 if (iwl_mvm_scan_use_ebs(mvm, vif))
1116 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1117 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1118 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1119
1120 cmd->n_channels = params->n_channels;
1121
1122 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1123
1124 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1125 params->n_channels, ssid_bitmap, cmd);
1126
1127 for (i = 0; i < params->n_scan_plans; i++) {
1128 struct cfg80211_sched_scan_plan *scan_plan =
1129 &params->scan_plans[i];
1130
1131 sec_part->schedule[i].iter_count = scan_plan->iterations;
1132 sec_part->schedule[i].interval =
1133 cpu_to_le16(scan_plan->interval);
1134 }
1135
1136 /*
1137 * If the number of iterations of the last scan plan is set to
1138 * zero, it should run infinitely. However, this is not always the case.
1139 * For example, when regular scan is requested the driver sets one scan
1140 * plan with one iteration.
1141 */
1142 if (!sec_part->schedule[i - 1].iter_count)
1143 sec_part->schedule[i - 1].iter_count = 0xff;
1144
1145 sec_part->delay = cpu_to_le16(params->delay);
1146 sec_part->preq = params->preq;
1147
1148 return 0;
1149 }
1150
1151 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1152 {
1153 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1154 }
1155
1156 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1157 {
1158 /* This looks a bit arbitrary, but the idea is that if we run
1159 * out of possible simultaneous scans and the userspace is
1160 * trying to run a scan type that is already running, we
1161 * return -EBUSY. But if the userspace wants to start a
1162 * different type of scan, we stop the opposite type to make
1163 * space for the new request. The reason is backwards
1164 * compatibility with old wpa_supplicant that wouldn't stop a
1165 * scheduled scan before starting a normal scan.
1166 */
1167
1168 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1169 return 0;
1170
1171 /* Use a switch, even though this is a bitmask, so that more
1172 * than one bits set will fall in default and we will warn.
1173 */
1174 switch (type) {
1175 case IWL_MVM_SCAN_REGULAR:
1176 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1177 return -EBUSY;
1178 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1179 case IWL_MVM_SCAN_SCHED:
1180 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1181 return -EBUSY;
1182 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1183 case IWL_MVM_SCAN_NETDETECT:
1184 /* No need to stop anything for net-detect since the
1185 * firmware is restarted anyway. This way, any sched
1186 * scans that were running will be restarted when we
1187 * resume.
1188 */
1189 return 0;
1190 default:
1191 WARN_ON(1);
1192 break;
1193 }
1194
1195 return -EIO;
1196 }
1197
1198 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1199 struct cfg80211_scan_request *req,
1200 struct ieee80211_scan_ies *ies)
1201 {
1202 struct iwl_host_cmd hcmd = {
1203 .len = { iwl_mvm_scan_size(mvm), },
1204 .data = { mvm->scan_cmd, },
1205 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1206 };
1207 struct iwl_mvm_scan_params params = {};
1208 int ret;
1209 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1210
1211 lockdep_assert_held(&mvm->mutex);
1212
1213 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1214 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1215 return -EBUSY;
1216 }
1217
1218 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1219 if (ret)
1220 return ret;
1221
1222 /* we should have failed registration if scan_cmd was NULL */
1223 if (WARN_ON(!mvm->scan_cmd))
1224 return -ENOMEM;
1225
1226 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1227 return -ENOBUFS;
1228
1229 params.n_ssids = req->n_ssids;
1230 params.flags = req->flags;
1231 params.n_channels = req->n_channels;
1232 params.delay = 0;
1233 params.ssids = req->ssids;
1234 params.channels = req->channels;
1235 params.mac_addr = req->mac_addr;
1236 params.mac_addr_mask = req->mac_addr_mask;
1237 params.no_cck = req->no_cck;
1238 params.pass_all = true;
1239 params.n_match_sets = 0;
1240 params.match_sets = NULL;
1241
1242 params.scan_plans = &scan_plan;
1243 params.n_scan_plans = 1;
1244
1245 params.type =
1246 iwl_mvm_get_scan_type(mvm,
1247 vif->type == NL80211_IFTYPE_P2P_DEVICE);
1248
1249 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1250
1251 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1252 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1253 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1254 IWL_MVM_SCAN_REGULAR);
1255 } else {
1256 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1257 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1258 }
1259
1260 if (ret)
1261 return ret;
1262
1263 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1264 if (ret) {
1265 /* If the scan failed, it usually means that the FW was unable
1266 * to allocate the time events. Warn on it, but maybe we
1267 * should try to send the command again with different params.
1268 */
1269 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1270 return ret;
1271 }
1272
1273 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1274 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1275 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1276
1277 return 0;
1278 }
1279
1280 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1281 struct ieee80211_vif *vif,
1282 struct cfg80211_sched_scan_request *req,
1283 struct ieee80211_scan_ies *ies,
1284 int type)
1285 {
1286 struct iwl_host_cmd hcmd = {
1287 .len = { iwl_mvm_scan_size(mvm), },
1288 .data = { mvm->scan_cmd, },
1289 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1290 };
1291 struct iwl_mvm_scan_params params = {};
1292 int ret;
1293
1294 lockdep_assert_held(&mvm->mutex);
1295
1296 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1297 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1298 return -EBUSY;
1299 }
1300
1301 ret = iwl_mvm_check_running_scans(mvm, type);
1302 if (ret)
1303 return ret;
1304
1305 /* we should have failed registration if scan_cmd was NULL */
1306 if (WARN_ON(!mvm->scan_cmd))
1307 return -ENOMEM;
1308
1309 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1310 return -ENOBUFS;
1311
1312 params.n_ssids = req->n_ssids;
1313 params.flags = req->flags;
1314 params.n_channels = req->n_channels;
1315 params.ssids = req->ssids;
1316 params.channels = req->channels;
1317 params.mac_addr = req->mac_addr;
1318 params.mac_addr_mask = req->mac_addr_mask;
1319 params.no_cck = false;
1320 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1321 params.n_match_sets = req->n_match_sets;
1322 params.match_sets = req->match_sets;
1323 if (!req->n_scan_plans)
1324 return -EINVAL;
1325
1326 params.n_scan_plans = req->n_scan_plans;
1327 params.scan_plans = req->scan_plans;
1328
1329 params.type =
1330 iwl_mvm_get_scan_type(mvm,
1331 vif->type == NL80211_IFTYPE_P2P_DEVICE);
1332
1333 /* In theory, LMAC scans can handle a 32-bit delay, but since
1334 * waiting for over 18 hours to start the scan is a bit silly
1335 * and to keep it aligned with UMAC scans (which only support
1336 * 16-bit delays), trim it down to 16-bits.
1337 */
1338 if (req->delay > U16_MAX) {
1339 IWL_DEBUG_SCAN(mvm,
1340 "delay value is > 16-bits, set to max possible\n");
1341 params.delay = U16_MAX;
1342 } else {
1343 params.delay = req->delay;
1344 }
1345
1346 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1347 if (ret)
1348 return ret;
1349
1350 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1351
1352 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1353 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1354 ret = iwl_mvm_scan_umac(mvm, vif, &params, IWL_MVM_SCAN_SCHED);
1355 } else {
1356 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1357 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1358 }
1359
1360 if (ret)
1361 return ret;
1362
1363 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1364 if (!ret) {
1365 IWL_DEBUG_SCAN(mvm,
1366 "Sched scan request was sent successfully\n");
1367 mvm->scan_status |= type;
1368 } else {
1369 /* If the scan failed, it usually means that the FW was unable
1370 * to allocate the time events. Warn on it, but maybe we
1371 * should try to send the command again with different params.
1372 */
1373 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1374 }
1375
1376 return ret;
1377 }
1378
1379 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1380 struct iwl_rx_cmd_buffer *rxb)
1381 {
1382 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1383 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1384 u32 uid = __le32_to_cpu(notif->uid);
1385 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1386
1387 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1388 return;
1389
1390 /* if the scan is already stopping, we don't need to notify mac80211 */
1391 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1392 ieee80211_scan_completed(mvm->hw, aborted);
1393 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1394 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1395 ieee80211_sched_scan_stopped(mvm->hw);
1396 }
1397
1398 mvm->scan_status &= ~mvm->scan_uid_status[uid];
1399 IWL_DEBUG_SCAN(mvm,
1400 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1401 uid, mvm->scan_uid_status[uid],
1402 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1403 "completed" : "aborted",
1404 iwl_mvm_ebs_status_str(notif->ebs_status));
1405 IWL_DEBUG_SCAN(mvm,
1406 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1407 notif->last_schedule, notif->last_iter,
1408 __le32_to_cpu(notif->time_from_last_iter));
1409
1410 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1411 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1412 mvm->last_ebs_successful = false;
1413
1414 mvm->scan_uid_status[uid] = 0;
1415 }
1416
1417 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1418 struct iwl_rx_cmd_buffer *rxb)
1419 {
1420 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1421 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1422 u8 buf[256];
1423
1424 IWL_DEBUG_SCAN(mvm,
1425 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1426 notif->status, notif->scanned_channels,
1427 iwl_mvm_dump_channel_list(notif->results,
1428 notif->scanned_channels, buf,
1429 sizeof(buf)));
1430 }
1431
1432 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1433 {
1434 struct iwl_umac_scan_abort cmd = {};
1435 int uid, ret;
1436
1437 lockdep_assert_held(&mvm->mutex);
1438
1439 /* We should always get a valid index here, because we already
1440 * checked that this type of scan was running in the generic
1441 * code.
1442 */
1443 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1444 if (WARN_ON_ONCE(uid < 0))
1445 return uid;
1446
1447 cmd.uid = cpu_to_le32(uid);
1448
1449 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1450
1451 ret = iwl_mvm_send_cmd_pdu(mvm,
1452 iwl_cmd_id(SCAN_ABORT_UMAC,
1453 IWL_ALWAYS_LONG_GROUP, 0),
1454 0, sizeof(cmd), &cmd);
1455 if (!ret)
1456 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1457
1458 return ret;
1459 }
1460
1461 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1462 {
1463 struct iwl_notification_wait wait_scan_done;
1464 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1465 SCAN_OFFLOAD_COMPLETE, };
1466 int ret;
1467
1468 lockdep_assert_held(&mvm->mutex);
1469
1470 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1471 scan_done_notif,
1472 ARRAY_SIZE(scan_done_notif),
1473 NULL, NULL);
1474
1475 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1476
1477 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1478 ret = iwl_mvm_umac_scan_abort(mvm, type);
1479 else
1480 ret = iwl_mvm_lmac_scan_abort(mvm);
1481
1482 if (ret) {
1483 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1484 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1485 return ret;
1486 }
1487
1488 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1489
1490 return ret;
1491 }
1492
1493 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1494 {
1495 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1496 return sizeof(struct iwl_scan_req_umac) +
1497 sizeof(struct iwl_scan_channel_cfg_umac) *
1498 mvm->fw->ucode_capa.n_scan_channels +
1499 sizeof(struct iwl_scan_req_umac_tail);
1500
1501 return sizeof(struct iwl_scan_req_lmac) +
1502 sizeof(struct iwl_scan_channel_cfg_lmac) *
1503 mvm->fw->ucode_capa.n_scan_channels +
1504 sizeof(struct iwl_scan_probe_req);
1505 }
1506
1507 /*
1508 * This function is used in nic restart flow, to inform mac80211 about scans
1509 * that was aborted by restart flow or by an assert.
1510 */
1511 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1512 {
1513 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1514 int uid, i;
1515
1516 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1517 if (uid >= 0) {
1518 ieee80211_scan_completed(mvm->hw, true);
1519 mvm->scan_uid_status[uid] = 0;
1520 }
1521 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1522 if (uid >= 0 && !mvm->restart_fw) {
1523 ieee80211_sched_scan_stopped(mvm->hw);
1524 mvm->scan_uid_status[uid] = 0;
1525 }
1526
1527 /* We shouldn't have any UIDs still set. Loop over all the
1528 * UIDs to make sure there's nothing left there and warn if
1529 * any is found.
1530 */
1531 for (i = 0; i < mvm->max_scans; i++) {
1532 if (WARN_ONCE(mvm->scan_uid_status[i],
1533 "UMAC scan UID %d status was not cleaned\n",
1534 i))
1535 mvm->scan_uid_status[i] = 0;
1536 }
1537 } else {
1538 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1539 ieee80211_scan_completed(mvm->hw, true);
1540
1541 /* Sched scan will be restarted by mac80211 in
1542 * restart_hw, so do not report if FW is about to be
1543 * restarted.
1544 */
1545 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1546 ieee80211_sched_scan_stopped(mvm->hw);
1547 }
1548 }
1549
1550 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1551 {
1552 int ret;
1553
1554 if (!(mvm->scan_status & type))
1555 return 0;
1556
1557 if (iwl_mvm_is_radio_killed(mvm)) {
1558 ret = 0;
1559 goto out;
1560 }
1561
1562 ret = iwl_mvm_scan_stop_wait(mvm, type);
1563 if (!ret)
1564 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1565 out:
1566 /* Clear the scan status so the next scan requests will
1567 * succeed and mark the scan as stopping, so that the Rx
1568 * handler doesn't do anything, as the scan was stopped from
1569 * above.
1570 */
1571 mvm->scan_status &= ~type;
1572
1573 if (type == IWL_MVM_SCAN_REGULAR) {
1574 /* Since the rx handler won't do anything now, we have
1575 * to release the scan reference here.
1576 */
1577 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1578 if (notify)
1579 ieee80211_scan_completed(mvm->hw, true);
1580 } else if (notify) {
1581 ieee80211_sched_scan_stopped(mvm->hw);
1582 }
1583
1584 return ret;
1585 }
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